The circulation oil pump is the core of the thermal oil boiler system. Its stable operation is crucial to the heating system and the continuity of production, thus requiring scientific maintenance.
Daily Operation Monitoring
1. Temperature Monitoring: Closely monitor the bearing temperature of the circulation oil pump. For rolling bearings, the normal temperature should not exceed 70°C, and for sliding bearings, it should not exceed 65°C. An abnormal increase in temperature may be caused by factors such as lack of bearing lubrication, wear, internal friction, and overload in the pump. You can touch it by hand or use an infrared thermometer for measurement. If any abnormality is detected, stop the machine immediately for troubleshooting.
2. Pressure Monitoring: Check whether the inlet and outlet pressures of the oil pump are stable. Large pressure fluctuations may indicate pipeline blockage, pump cavitation, or system leakage. A low inlet pressure may be due to a blocked oil suction pipeline or insufficient oil level, while a high outlet pressure may be caused by an incompletely opened oil outlet pipeline valve or high system resistance.
3. Flow Rate Inspection: Regularly check the circulation flow rate of the thermal oil. A decrease in flow rate may be due to wear of internal parts of the oil pump, such as corrosion or damage to the impeller, or air intake in the system, resulting in reduced work efficiency. You can read the flow rate through a flow meter and adjust the flow rate as needed.
Lubrication System Maintenance
1. Lubricating Oil Selection: According to the operating environment and work requirements of the oil pump, select high-temperature-resistant and antioxidant lubricating oil. For different types of oil pumps, choose according to the equipment manual.
2. Oil Level Check: Daily, check the oil level of the oil pump to ensure it is within the range indicated on the oil gauge. If the oil level is too low, the bearings may lack lubrication and be prone to wear; if it is too high, the oil temperature may rise and even cause leakage. You can observe through the oil gauge or oil level indicator and add oil in a timely manner if it is insufficient.
3. Lubricating Oil Replacement: Generally, replace the lubricating oil every 2000 – 3000 hours of operation, as the oil will oxidize and become contaminated over long – term use. When replacing, drain the old oil, clean the oil tank and oil passages, and then add new oil.
Sealing System Maintenance
1. Mechanical Seal Inspection: Most circulation oil pumps use mechanical seals to prevent thermal oil leakage. Regularly check whether there is any leakage at the seal. For slight leakage, the tightness of the seal gland can be adjusted. Severe leakage may be due to wear of the seal surface, aging or damage of the seals, which need to be replaced in a timely manner. Pay attention to using the correct seal model and installing it as required.
2. Maintenance of the Seal Auxiliary System: For oil pumps with a seal auxiliary system (such as a flushing and cooling system), ensure the normal operation of the auxiliary system. Check the flow rate and pressure of the flushing fluid and whether the cooling water pipeline is unobstructed.
Regular Comprehensive Maintenance
1. Disassembly Inspection: Once a year or every 8000 – 10000 hours of operation, disassemble and inspect the oil pump. Remove the pump body and check the wear of the impeller, shaft, and bearings. Corrosion, wear, or deformation of the impeller will affect the flow rate and head. If the shaft wear exceeds the allowable range, it will cause increased vibration. If the bearings are severely worn, they all need to be repaired or replaced.
2. Cleaning and Maintenance: During the disassembly inspection, thoroughly clean the oil stains, impurities, and scale inside the pump body. At the same time, clean the pump housing and pipelines and carry out anti – corrosion treatment to extend the equipment’s lifespan.
3. Performance Testing: After maintenance, test the performance of the oil pump. Start the pump and check whether it operates smoothly, whether there is any abnormal vibration or noise. Monitor parameters such as temperature, pressure, and flow rate to ensure they meet the standards. If they do not meet the standards, re – check and debug. Proper maintenance of the circulation oil pump can extend its service life, improve the reliability and stability of the heating system, and ensure continuous and efficient heating for industrial production. Users should conduct regular inspections and maintenance in strict accordance with the requirements.Fuel Gas Boiler, Coal Burning Boiler, Electric Heating Boiler, Autoclave-HANYU Boiler (Henan) Co., Ltd.
